<!DOCTYPE html>
<html>
<head>
    <meta charset="utE-8"/>
<title></title>
<style type="text/css">
#pl {font-weight: 100; } 
#p2 {font-weight:400;}
#p3 {font-weight: 700;}
#p4 {font-weight: 900}
</style>
</head>
<body>
<P id="p1">字体粗细为:100(1ighter )</p>
<P id="p2">字体粗细为:400(norma1)</p>
<P id="p3">字体粗细为:700(bo1d)</p>
<P id="p4">字体粗细为:900(bolder)</p>
</body> 
</html>
